According to this source, all the rad-hardened versions were SOS:
"The COSMAC's that flew in space were space/radiation hardened versions
using a CMOS/SOS chip technology. These radiation hardened versions were
developed in conjunction with the Sandia National Laboratories."
Other sources treat the two as separate options.
There is also a "high reliability" version, which they designate with "/3".
The datasheet is at
http://www.intersil.com/data/fn/fn1/fn1441/fn1441.pdf.
Maybe the SOS is "/2" or something like that?
I recently built an Elf, BTW:
http://www.jkearney.com/elf. It's not going
into space anytime soon.
Jim
----- Original Message -----
From: Bob Shannon
To: cctalk_at_classiccmp.org
Sent: Tuesday, October 01, 2002 10:41 AM
Subject: Re: Attention 1802 fans...
Some think all 1802's use the SOS process, but I beleive that this is not
the case, its too expensive for
normal parts.
Some time back, I got a sample from an engineer at RCA, of a real rad-hard
1802 with extra instructions
added to accelerate the Forth Kernel. I beleive that this is called either
an 1805, or perhaps an 1806.
So does anyone know what suffix is used to indicate the SOS process was used
on a given 180x chip?
J.C. Wren wrote:
Using www.cosmacelf.com, there are dozens of sites devoted to the
1802.There are emulators for Windows, Palms, and probably *nix. In fact,
justthe other night I converted Frankasm to run under Linux (didn't take
much,but I also went through the 1802 and base code, making
prototypesmodernized, and basically getting it to compiled with -W -Wall GCC
flags). Misc items: The rad-hard version of the 1802 was saphirre on
silicon, fromwhat I've been told. You can pick up the RCA Studio II on eBay
prettycheap. These are 1802 based. There is the Netronics Elf, Quest Super
Elf,and the RCA SA711 (I own 1 each of the latter, plus a couple of RCA
StdioII's). One day I stumbled across about 110 pieces of CDP1802ACEs in
AustinElectronics. This got me on the 1802 kick, something I had always
wanted toplay with, but never got around to. It's a n
eat instruction set. Not perfect, but powerful. Lends itself toForth quite
well, and I imagine that a port of GCC to it wouldn't beoutrageous (not
compared to braindead architectures like the PIC, at anyrate). Lots of
nifty support chips. CDP1823 256x8 RAMS, CDP1861 video,there are port
expanders, larger RAMs, ROMs, the CDP1854 serial chip (found9 boards on
eBay, payed my board builder a couple bucks to desolder themall), some other
stuff. Expect to pay dearly for databooks. I won't mentioned what I've
spentlately, especially if Joe Rigdon won't (grin). --John-----Original
Message-----From: cctalk-admin_at_classiccmp.org
[mailto:cctalk-admin_at_classiccmp.org]OnBehalf Of Ben FranchukSent: Monday,
September 30, 2002 22:11To: cctalk_at_classiccmp.orgSubject: Re: Attention 1802
fans...Ross Archer wrote:
The 1802 was used in quite a number of Amateur radio ("ham")satellites.It
was one of the first relatively "rad-hard" micros fromwhat I
rememberreading, due in large part to its CMOS construction. Iguess those
daysthere were a few PMOS CPUs (8008, 8080) and a few NMOS CPUs(Z80,
6502,9900JL), and exactly one CMOS CPU -- the CDP1802. So it was1802 or
bust. :)
The other CMOS chip at the time was the PDP-8 on a chip.The 1802 was I think
was a special CMOS version that waslatch up and rad-hardened. Several CPU's
are rad-hard but the 1802 was the first cheap one.
Received on Tue Oct 01 2002 - 10:04:29 BST